[PATCH] lib: sbi: Fix sign-extension in sbi_misaligned_load_handler()

[Jessica Clarke]

> --- a/lib/sbi/sbi_misaligned_ldst.c
> +++ b/lib/sbi/sbi_misaligned_ldst.c
> @@ -128,7 +128,7 @@ int sbi_misaligned_load_handler(ulong addr, ulong tval2, ulong tinst,
> 	}
> 
> 	if (!fp)
> -		SET_RD(insn, regs, val.data_ulong << shift >> shift);
> +		SET_RD(insn, regs, (long)val.data_ulong << shift >> shift);

Left-shifting is undefined behaviour if it sets the sign bit, so a
standards-conforming C compiler is free to ignore the cast entirely
and assume the intermediate left-shifted value is non-negative.

Jess